Colin Sinclair (tennis)
| Country (sports) | Northern Mariana Islands (2018–) United States (2013–2017) Australia (–2013) Pacific Oceania (Davis Cup tournaments) | |||||||||||||||||||||||
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| Residence | Brisbane, Australia | |||||||||||||||||||||||
| Born | 19 December 1994 | |||||||||||||||||||||||
| Height | 6 ft 2 in (1.88 m) | |||||||||||||||||||||||
| Plays | Right-handed (two-handed backhand) | |||||||||||||||||||||||
| College | Cornell University | |||||||||||||||||||||||
| Coach | Jeff Race, Ian Malpass, Silviu Tanasoiu | |||||||||||||||||||||||
| Prize money | US$149,434 | |||||||||||||||||||||||
| Singles | ||||||||||||||||||||||||
| Career record | 1-2 | |||||||||||||||||||||||
| Career titles | 0 | |||||||||||||||||||||||
| Highest ranking | No. 340 (18 September 2023) | |||||||||||||||||||||||
| Current ranking | No. 786 (01 February 2026) | |||||||||||||||||||||||
| Doubles | ||||||||||||||||||||||||
| Career record | 1-1 | |||||||||||||||||||||||
| Career titles | 0 | |||||||||||||||||||||||
| Highest ranking | No. 200 (10 April 2023) | |||||||||||||||||||||||
| Current ranking | No. 283 (24 November 2025) | |||||||||||||||||||||||
| Davis Cup | 18–5 | |||||||||||||||||||||||
Medal record
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| Last updated on: 30 November 2025. | ||||||||||||||||||||||||
Colin Sinclair (born December 19, 1994) is an American tennis player representing the Northern Mariana Islands. He achieved a career best singles ranking of world No. 340 on 18 September 2023 and a doubles ranking of No. 200 on 10 April 2023.
Sinclair has won four ATP Challenger and eight ITF Tour doubles titles. Additionally, he has won three singles ITF titles. He represents the Northern Mariana Islands in Davis Cup as part of the Pacific Oceania team since 2017 and has a career record of 18–5 (13–3 in singles, 5–2 in doubles) in the competition.